Beamforming Without Plane Waves

date March 19, 1986
comments no comments.

Wednesday, March 19, 1986 4:00 p.m.

Robert A. Koch
Applied Research Laboratories
The University of Texas at Austin

Practical applications of imaging (beamforming) techniques for inhomogeneous media require an assessment of the constraints imposed by the propagation environment. In this seminar the general features of such constraints will be illustrated with results for an ocean acoustic waveguide. A matched filter algorithm and a normal mode representation of propagation in the waveguide were used to construct an imaging processor (beamformer). The performance of the processor was simulated using acoustic receiver inputs predicted by a propagation model which was also based on normal modes. Constraints on receiver geometry, e.g., element spacing, and possible effects of environmental variability will be discussed.